package csl.blog.server.utils;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.ListOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.ValueOperations;
import org.springframework.data.redis.support.atomic.RedisAtomicInteger;
import org.springframework.data.redis.support.atomic.RedisAtomicLong;
import org.springframework.stereotype.Component;

import java.util.Collection;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.concurrent.TimeUnit;

/**
 * @Description: TODO
 * @author: 隔山海
 * @date: 2021年10月09日 13:36
 */
@Component
public class RedisUtils {

    @Autowired
    private RedisTemplate redisTemplate;


    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key 缓存的键值
     * @param value 缓存的值
     */
    public <T> void setCacheObject(final String key, final T value)
    {
        redisTemplate.opsForValue().set(key, value);
    }

    /**
     * 缓存基本的对象，Integer、String、实体类等
     *
     * @param key 缓存的键值
     * @param value 缓存的值
     * @param timeout 时间
     * @param timeUnit 时间颗粒度
     */
    public <T> void setCacheObject(final String key, final T value, final Integer timeout, final TimeUnit timeUnit)
    {
        redisTemplate.opsForValue().set(key, value, timeout, timeUnit);
    }

    /**
     * 设置有效时间
     *
     * @param key Redis键
     * @param timeout 超时时间
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout)
    {
        return expire(key, timeout, TimeUnit.SECONDS);
    }

    /**
     * 设置有效时间
     *
     * @param key Redis键
     * @param timeout 超时时间
     * @param unit 时间单位
     * @return true=设置成功；false=设置失败
     */
    public boolean expire(final String key, final long timeout, final TimeUnit unit)
    {
        return redisTemplate.expire(key, timeout, unit);
    }

    /**
     * 获得缓存的基本对象。
     *
     * @param key 缓存键值
     * @return 缓存键值对应的数据
     */
    public <T> T getCacheObject(final String key)
    {
        ValueOperations<String, T> operation = redisTemplate.opsForValue();
        return operation.get(key);
    }

    /**
     * 删除单个对象
     *
     * @param key
     */
    public boolean deleteObject(final String key)
    {
        return redisTemplate.delete(key);
    }

    /**
     * 删除集合对象
     *
     * @param collection 多个对象
     * @return
     */
    public long deleteObject(final Collection collection)
    {
        return redisTemplate.delete(collection);
    }

    /**
     * 缓存List数据
     *
     * @param key 缓存的键值
     * @param dataList 待缓存的List数据
     * @return 缓存的对象
     */
    public <T> long setCacheList(final String key, final List<T> dataList)
    {
        Long count = redisTemplate.opsForList().rightPushAll(key, dataList);
        return count == null ? 0 : count;
    }

    /**
     * 获得缓存的list对象
     *
     * @param key 缓存的键值
     * @return 缓存键值对应的数据
     */
    public <T> List<T> getCacheList(final String key)
    {
        return redisTemplate.opsForList().range(key, 0, -1);
    }

    /**
     * 缓存Set
     *
     * @param key 缓存键值
     * @param dataSet 缓存的数据
     * @return 缓存数据的对象
     */
    public <T> long setCacheSet(final String key, final Set<T> dataSet)
    {
        Long count = redisTemplate.opsForSet().add(key, dataSet);
        return count == null ? 0 : count;
    }

    /**
     * 获得缓存的set
     *
     * @param key
     * @return
     */
    public <T> Set<T> getCacheSet(final String key)
    {
        return redisTemplate.opsForSet().members(key);
    }

    /**
     * 缓存Map
     *
     * @param key
     * @param dataMap
     */
    public <T> void setCacheMap(final String key, final Map<String, T> dataMap)
    {
        if (dataMap != null) {
            redisTemplate.opsForHash().putAll(key, dataMap);
        }
    }

    /**
     * 获得缓存的Map
     *
     * @param key
     * @return
     */
    public <T> Map<String, T> getCacheMap(final String key)
    {
        return redisTemplate.opsForHash().entries(key);
    }

    /**
     * 往Hash中存入数据
     *
     * @param key Redis键
     * @param hKey Hash键
     * @param value 值
     */
    public <T> void setCacheMapValue(final String key, final String hKey, final T value)
    {
        redisTemplate.opsForHash().put(key, hKey, value);
    }

    /**
     * 获取Hash中的数据
     *
     * @param key Redis键
     * @param hKey Hash键
     * @return Hash中的对象
     */
    public <T> T getCacheMapValue(final String key, final String hKey)
    {
        HashOperations<String, String, T> opsForHash = redisTemplate.opsForHash();
        return opsForHash.get(key, hKey);
    }

    /**
     * 获取多个Hash中的数据
     *
     * @param key Redis键
     * @param hKeys Hash键集合
     * @return Hash对象集合
     */
    public <T> List<T> getMultiCacheMapValue(final String key, final Collection<Object> hKeys)
    {
        return redisTemplate.opsForHash().multiGet(key, hKeys);
    }


    /**
     * 删除Hash中的对象
     * @param key
     * @param fields
     */
    public long deleteCacheMap(String key, Object... fields) {
        return redisTemplate.opsForHash().delete(key, fields);
    }

    /**
     * 获得缓存的基本对象列表
     *
     * @param pattern 字符串前缀
     * @return 对象列表
     */
    public Collection<String> keys(final String pattern)
    {
        return redisTemplate.keys(pattern);
    }

    /**
     * 添加对象到队列
     * @param key
     * @param value
     * @param timeout
     * @param unit
     */
    public <T> void leftPush(String key, final T value,final long timeout, final TimeUnit unit) {
        ListOperations<String,T> listOperations = redisTemplate.opsForList();
        listOperations.leftPush(key, value);
        if (timeout != -1) {
            expire(key, timeout, unit);
        }
    }


    /**
     * 从队列获取对象
     * @param key
     * @return
     */
    public <T> T rightPop(String key) {
        ListOperations<String,T> listOperations = redisTemplate.opsForList();
        return listOperations.rightPop(key);
    }


    /**
     * 获取long类型自增序号
     * @param key
     * @param timeOut
     * @param unit
     * @return
     */
    public Long incrLong(String key, final long timeOut, final TimeUnit unit) {
        RedisAtomicLong entityIdCounter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
        Long increment = entityIdCounter.getAndIncrement(); // 从0开始

        if ((null == increment || increment.longValue() == 0) && timeOut > 0) {//初始设置过期时间
            entityIdCounter.expire(timeOut, unit);
        }

        return increment;
    }


    /**
     * 获取指定步长的序号
     * @param key
     * @param delta
     * @param timeOut
     * @param unit
     * @return
     */
    public Long incrLong(String key, final long delta, final long timeOut, final TimeUnit unit) {
        RedisAtomicLong entityIdCounter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
        Long increment = entityIdCounter.getAndAdd(delta); // 从0开始

        if ((null == increment || increment.longValue() == 0) && timeOut > 0) {//初始设置过期时间
            entityIdCounter.expire(timeOut, unit);
        }

        return increment;
    }

    /**
     * 指定long初始值(非重置,redis有值返回最新值，无值返回初始值)
     * @param key
     * @param timeOut
     * @param unit
     * @param initialValue
     * @return
     */
    public Long initialLong(String key, final long timeOut, final TimeUnit unit,final long initialValue) {
        RedisAtomicLong entityIdCounter = new RedisAtomicLong(key, redisTemplate.getConnectionFactory());
        synchronized(this){
            if(entityIdCounter.get() == 0){
                entityIdCounter.set(initialValue);
                if(timeOut > 0){
                    entityIdCounter.expire(timeOut, unit);
                }
            }
        }
        return entityIdCounter.getAndIncrement();
    }

    /**
     * 指定int初始值(非重置，redis有值返回最新值，无值返回初始值)
     * @param key
     * @param timeOut
     * @param unit
     * @param initialValue
     * @return
     */
    public Integer initialInteger(String key, final long timeOut, final TimeUnit unit,final int initialValue) {
        RedisAtomicInteger entityIdCounter = new RedisAtomicInteger(key, redisTemplate.getConnectionFactory());
        synchronized(this){
            if(entityIdCounter.get() == 0){
                entityIdCounter.set(initialValue);
                if(timeOut > 0){
                    entityIdCounter.expire(timeOut, unit);
                }
            }
        }
        return entityIdCounter.getAndIncrement();
    }


    /**
     * 获取Integer类型自增序号
     * @param key
     * @param timeOut
     * @param unit
     * @return
     */
    public Integer incrInteger(String key, final long timeOut, final TimeUnit unit) {
        RedisAtomicInteger entityIdCounter = new RedisAtomicInteger(key, redisTemplate.getConnectionFactory());
        Integer increment = entityIdCounter.getAndIncrement(); // 从0开始

        if ((null == increment || increment.longValue() == 0) && timeOut > 0) {//初始设置过期时间
            entityIdCounter.expire(timeOut, unit);
        }

        return increment;
    }

    /**
     * 获取指定步长的序号
     * @param key
     * @param delta
     * @param timeOut
     * @param unit
     * @return
     */
    public Integer incrInteger(String key, final int delta, final long timeOut, final TimeUnit unit) {
        RedisAtomicInteger entityIdCounter = new RedisAtomicInteger(key, redisTemplate.getConnectionFactory());
        Integer increment = entityIdCounter.getAndAdd(delta); // 从0开始

        if ((null == increment || increment.longValue() == 0) && timeOut > 0) {//初始设置过期时间
            entityIdCounter.expire(timeOut, unit);
        }
        return increment;
    }
}
